Then someone should be reprimanded for contaminating the sample. There is a strand of hair on the first image and it appears to be a bit of lint or dandruff on the other image.
On behalf of Mr. Torgue, that sentence had too many words. An apology is requested along with an air guitar solo.
As for David Goyer's comment, the sentiment seems to be that he isn't a good writer. That should be more concerning than his joke {insert explosion noise here}.
Response to first sequence of inquires:
It can improve/diminish the stimulation caused by the increase of content. The audio content does not change due to the addition of a visual medium.